Conventional grand pianos have three pedals that, in most cases, control the instrument's sustain for the entire keyboard, selective sustain for specific notes and softening of the sound. Roland's RPU-3 does that and more.

For the feel of a genuine grand piano, players of digital pianos frequently prefer the fullest resemblence to the original. Roland's RPU-3 pedal unit offers the experience of a grand piano pedal assembly with the 3 conventional functions, but also adds the ability to control other functions in other Roland pianos. Examples include the RD-700 series pianos or the FP-7F, which features effects like loops and harmonies.